When did momondo last update prices for flights from Lambert-St Louis Airport to Sofia Airport?

Prices for flights from Lambert-St Louis Airport to Sofia Airport are updated daily.

How many operators does momondo search for flights from Lambert-St Louis Airport to Sofia Airport?

The number of operators available for flights from Lambert-St Louis Airport to Sofia Airport is 2 as of March 2026.

How old do you have to be to fly from Lambert-St Louis Airport to Sofia Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sofia Airport.

What documentation or ID do you need to fly to Sofia Airport?

The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$304 Cheap Flights from St. Louis to Sofia in 2026

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One-way

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Cheap round-trip flights

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6:05 pm - 6:40 pm

STL

SOF

16h 35m

2 stops

6:20 am - 1:25 pm

SOF

STL

15h 05m

1 stop

$655United Airlines

Fri, Apr 17 - Fri, May 8

4:05 pm - 12:10 pm

STL

SOF

36h 05m

2 stops

6:20 am - 7:51 pm

SOF

STL

21h 31m

2 stops

$669United Airlines

Sat, Apr 18 - Sat, May 9

6:55 pm - 11:00 pm

STL

SOF

20h 05m

2 stops

6:20 am - 1:25 pm

SOF

STL

15h 05m

1 stop

$686Lufthansa

Sun, Aug 30 - Wed, Sep 16

4:05 pm - 12:10 pm

STL

SOF

36h 05m

2 stops

6:20 am - 1:25 pm

SOF

STL

15h 05m

1 stop

$688United Airlines

Sat, Apr 4 - Wed, Jun 17

4:05 pm - 12:10 pm

STL

SOF

36h 05m

2 stops

1:50 pm - 8:05 pm

SOF

STL

38h 15m

2 stops

$691United Airlines

Sat, Apr 4 - Wed, Jun 17

3:30 pm - 6:10 pm

STL

SOF

18h 40m

1 stop

6:20 am - 1:25 pm

SOF

STL

15h 05m

1 stop

$695Lufthansa

Sun, Aug 30 - Wed, Sep 16

8:03 pm - 8:10 pm

STL

SOF

40h 07m

2 stops

2:15 pm - 5:24 pm

SOF

STL

35h 09m

2 stops

$702British Airways

Fri, Apr 17 - Fri, May 8

6:55 pm - 11:00 pm

STL

SOF

20h 05m

2 stops

6:10 am - 6:41 pm

SOF

STL

44h 31m

2 stops

$703Multiple Airlines

Sun, Aug 30 - Wed, Sep 16

10:09 am - 11:00 pm

STL

SOF

28h 51m

2 stops

1:55 pm - 10:45 pm

SOF

STL

16h 50m

2 stops

$715United Airlines

Sat, Apr 18 - Sat, May 9

1:00 pm - 1:35 pm

STL

SOF

40h 35m

2 stops

6:55 pm - 11:36 pm

SOF

STL

36h 41m

2 stops

$720Multiple Airlines

Sat, May 9 - Mon, May 25

United Airlines flights from St. Louis to Sofia

Our best United Airlines deals on St. Louis to Sofia flight tickets

United Airlines

Apr 17

STL6:05 pmLambert-St Louis

16h 35m

2 stops

SOF6:40 pmSofia

May 8

SOF6:20 amSofia

15h 05m

1 stop

STL1:25 pmLambert-St Louis

$655

United Airlines

Apr 18

STL4:05 pmLambert-St Louis

36h 05m

2 stops

SOF12:10 pmSofia

May 9

SOF6:20 amSofia

21h 31m

2 stops

STL7:51 pmLambert-St Louis

$669

United Airlines

Apr 4

STL4:05 pmLambert-St Louis

36h 05m

2 stops

SOF12:10 pmSofia

Jun 17

SOF6:20 amSofia

15h 05m

1 stop

STL1:25 pmLambert-St Louis

$688

British Airways flights from St. Louis to Sofia

Our best British Airways deals on St. Louis to Sofia flight tickets

British Airways

Apr 17

STL8:03 pmLambert-St Louis

40h 07m

2 stops

SOF8:10 pmSofia

May 8

SOF2:15 pmSofia

35h 09m

2 stops

STL5:24 pmLambert-St Louis

$702

British Airways

Apr 11

STL8:03 pmLambert-St Louis

39h 17m

2 stops

SOF7:20 pmSofia

Jun 17

SOF9:25 pmSofia

34h 34m

2 stops

STL11:59 pmLambert-St Louis

$732

British Airways

Apr 17

STL8:03 pmLambert-St Louis

40h 07m

2 stops

SOF8:10 pmSofia

May 15

SOF2:15 pmSofia

37h 15m

2 stops

STL7:30 pmLambert-St Louis

$777

Fly from

Fly to

Route

Depart

Return

Price

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Fri 4/17

6:05 pm-6:40 pm

2 stops16h 35m

Sofia

Fri 5/8

6:20 am-1:25 pm

1 stop15h 05m

$655

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sat 4/18

4:05 pm-12:10 pm

2 stops36h 05m

Sofia

Sat 5/9

6:20 am-7:51 pm

2 stops21h 31m

$669

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 8/30

6:55 pm-11:00 pm

2 stops20h 05m

Sofia

Wed 9/16

6:20 am-1:25 pm

1 stop15h 05m

$686

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sat 4/4

4:05 pm-12:10 pm

2 stops36h 05m

Sofia

Wed 6/17

6:20 am-1:25 pm

1 stop15h 05m

$688

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sat 4/4

4:05 pm-12:10 pm

2 stops36h 05m

Sofia

Wed 6/17

1:50 pm-8:05 pm

2 stops38h 15m

$691

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 8/30

3:30 pm-6:10 pm

1 stop18h 40m

Sofia

Wed 9/16

6:20 am-1:25 pm

1 stop15h 05m

$695

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Fri 4/17

8:03 pm-8:10 pm

2 stops40h 07m

Sofia

Fri 5/8

2:15 pm-5:24 pm

2 stops35h 09m

$702

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sun 8/30

6:55 pm-11:00 pm

2 stops20h 05m

Sofia

Wed 9/16

6:10 am-6:41 pm

2 stops44h 31m

$703

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sat 4/18

10:09 am-11:00 pm

2 stops28h 51m

Sofia

Sat 5/9

1:55 pm-10:45 pm

2 stops16h 50m

$715

St. LouisSofia

STL - SOF

STLSOF

Lambert-St Louis

Sat 5/9

1:00 pm-1:35 pm

2 stops40h 35m

Sofia

Mon 5/25

6:55 pm-11:36 pm

2 stops36h 41m

$720

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from St. Louis to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

How far in advance should I book a flight to Sofia?

You are more likely to see cheaper flights to Sofia from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $888 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from St. Louis for as low as $785 on momondo.

Can stopping save me money on St. Louis to Sofia flights?

You could potentially save up to 17% on your flight if you consider stops on a St. Louis to Sofia flight.

When to book flights from St. Louis to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to Sofia according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap St. Louis to Sofia (STL to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Sofia

Fastest flight time	21h 05m
Direct flights	None

The fastest flight from St. Louis to Sofia takes 21h 05m

There are no direct flights from St. Louis to Sofia. There are no popular flight routes from St. Louis to Sofia.

Search flight deals

How far is Lambert-St Louis to Sofia by plane?
A flight from Lambert-St Louis to Sofia will travel around 5441.0 mi. 21h 05m is a normal flight duration for this route.
When did momondo last update prices for flights from Lambert-St Louis Airport to Sofia Airport?
Prices for flights from Lambert-St Louis Airport to Sofia Airport are updated daily.
How many operators does momondo search for flights from Lambert-St Louis Airport to Sofia Airport?
The number of operators available for flights from Lambert-St Louis Airport to Sofia Airport is 2 as of March 2026.
How old do you have to be to fly from Lambert-St Louis Airport to Sofia Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Sofia Airport.
What documentation or ID do you need to fly to Sofia Airport?
The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from St. Louis to Sofia?
Based on momondo bookings for flights between St. Louis and Sofia, the leading airline is Lufthansa, making up 72% of the total bookings. Other popular airlines include United Airlines with 28%.

Best airlines flying from St. Louis to Sofia

Compare and see reviews for airlines that fly from St. Louis to Sofia with momondo

Airline	Rating	Free Cancellation	Price
United Airlines	PriceFrom $560	Free Cancellation	Rating 7.4 9,389 reviews		Search United Airlines flights
Lufthansa	PriceFrom $598	Free Cancellation	Rating 6.8 7,826 reviews		Search Lufthansa flights

Bansko

Borovets

Velingrad

Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to Sofia?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Sofia. momondo saves you time and could save you money on your trip.

Can I find flights from St. Louis to Sofia with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Sofia from St. Louis with this policy.

How can momondo help me find flights from St. Louis to Sofia?

Once all potential St. Louis to Sofia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from St. Louis to Sofia right now. Can momondo alert me if prices change?

Price alerts on flights to Sofia from St. Louis are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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Cheap flights from St. Louis to Sofia from $304

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Sofia departing on 5/9. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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How to get the cheapest flight ticket from St. Louis to Sofia

How far in advance should I book a flight to Sofia?

Can stopping save me money on St. Louis to Sofia flights?

When to book flights from St. Louis to Sofia

Cheap St. Louis to Sofia (STL to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to Sofia

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Best airlines flying from St. Louis to Sofia

Compare and see reviews for airlines that fly from St. Louis to Sofia with momondo

Traveling to a place near Sofia?

Why use momondo?

An easier way to manage your Sofia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Bulgaria

Fly your favorite airline to Sofia

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List of cabin classes available on flights landing in Sofia. Availability may vary depending on flight origin and airline.

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